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【判断题】
无失真传输是指,系统的输出信号与输入信号相比,波形是完全相同的。A.
正确
B.
错误
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反馈参考答案：
举一反三
【简答题】________ you met the foreigner from Canada? A. Where it was that B Who it was that C. Where was it that D. Where was that
【简答题】有一台型号为S-560／10的三相变压器，Y，y 0 ～Y，y11接线，额定电压为10000／400V，供照明用电，若在二次接入额定电压220V，额定功率100W的白炽灯，求三相总共可容许接多少盏灯而变压器不过载。
【简答题】A．穿透作用 B．荧光作用 C．生物作用 D．电离作用 E．光化学作用 透视利用X线的
【单选题】_____ you met the foreigner from America? [ ]
A.
Where it was that
B.
Who it was that
C.
Where was it that
D.
Where was that
【单选题】The accident ________ to the man who _________ to be a foreigner, so it is hard to deal with. [ ]
A.
occurs; happened
B.
happened; occurred
C.
came about; occurred
D.
occurred; happened
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